JP2012254669A - Seat slide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat slide device which can reduce the number of wheels of rollers, and can make the wobbling of a seat hardly occur.SOLUTION: The seat 1 of a vehicle can be positioned in the fore-and-aft direction of the vehicle by the seat slide device 2. The seat slide device 2 has a pair of rail units 4a, 4b which are aligned in the seat width direction. Then, in the seat slide device 2, the number of the wheels of the rollers 13 which are arranged at the respective rail units 4a, 4b is set as three (13a, 13b and 13c), and an upper rail 6 is supported at three points by these three wheels with respect to a lower rail 5.

Description

  The present invention relates to a seat slide device for guiding a slide movement of a seat.

  Conventionally, a vehicle seat is attached to a vehicle body via a seat slide device that adjusts the position in the longitudinal direction of the vehicle body. The seat slide device enables a seat to slide along a rail and adjusts the position of the seat in the longitudinal direction of the vehicle by rolling a roller provided along the rail. As a roller structure of the sheet slide device, for example, application of the techniques of Patent Documents 1 and 2 is being studied.

  FIG. 9 shows a conventional general seat slide device 81. The seat slide device 81 has a pair of rail units 82 and 82 on both sides in the seat width direction. Each of the rail units 82 and 82 includes a lower rail 83 attached to the vehicle interior floor and an upper rail 84 attached to the back surface of the seat 85.

  Between the lower rail 83 and the upper rail 84, rollers 86 are interposed at a plurality of locations. The roller 86 is a double-supported type having a pair of wheels on both sides in the sheet width direction, and is disposed at two locations in the rail longitudinal direction (vehicle body longitudinal direction) of each rail unit 82. That is, the roller 86 is provided with a total of four wheels on each rail unit 82, 82, that is, a total of eight wheels on the entire seat 85.

JP-A-7-197404 JP 2001-213310 A

  However, since the seat slide device 81 in FIG. 9 requires a total of eight wheels as the rollers 86, the number of wheels is too large, and the sliding force when moving the seat 85 is increased. was there. However, simply reducing the number of wheels may lead to a problem of sheet rattling, so there was a need to develop a technology that could achieve both reduction in the number of wheels on the roller and prevention of sheet rattling. .

  An object of the present invention is to provide a seat slide device that can reduce the number of wheels of a roller and can prevent the occurrence of rattling.

  In order to solve the above problems, in the present invention, a plurality of rail units are provided in which the first rail member formed on one of the seat and the seat mounting surface slides relative to the second rail member formed on the other. In the seat slide device in which the position of the seat can be adjusted by the rail unit, three rollers arranged between the first rail member and the second rail member are provided for each rail unit. The gist is to support the first rail member and the second rail member at three points by the three rollers.

  According to the configuration of the present invention, since the first rail member and the second rail member are supported at three points by the three rollers, temporarily between the first rail member and the second rail member in the height direction. Even if a deviation occurs, this can be effectively absorbed by supporting the roller at three points. Therefore, it is possible to reduce the number of wheels of the roller, and it is also possible to prevent the sheet from rattling.

  The gist of the present invention is that a rattling suppression member is provided between the first rail member and the second rail member to suppress rattling between the rail members. According to this configuration, the rattling between the first rail member and the second rail member can be absorbed also by the rattling suppressing member. Therefore, the effect of suppressing the rattling of the sheet is enhanced.

  The gist of the present invention is that the rattling suppressing member is disposed between adjacent rollers arranged in the rail longitudinal direction in one rail unit. According to this configuration, for example, when the rail member on the seat mounting surface side is warped (a deformation in which the center of the rail member is lowered and both ends are lifted up), the first rail member and the second rail member are taken. There will be a gap between the two. However, if the rattling suppression member is arranged between the rollers as in this configuration, the rattling suppression member works to fill this gap, so that the effect of suppressing the rattling of the sheet is enhanced.

  According to the present invention, it is possible to reduce the number of wheels of the roller and to prevent the sheet from rattling.

1 is a side view illustrating an appearance of a seat slide device according to an embodiment. The top view of a seat slide apparatus. The disassembled perspective view of a rail unit. Sectional drawing of the roller part of a rail unit. Sectional drawing of the shoe part of a rail unit. (A) is the perspective view which looked at the shoe from one side, (b) is the perspective view which looked at the shoe from the other side. (A), (b) is a top view of the seat slide apparatus of another example. The top view of the seat slide apparatus of another example. The top view of the conventional seat slide apparatus.

Hereinafter, an embodiment of a seat slide device embodying the present invention will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the seat 1 installed in the vehicle is attached to the vehicle interior floor 3 via a seat slide device 2 that slides the seat 1 in the longitudinal direction of the vehicle body (X-axis direction in FIG. 1). ing. The seat slide device 2 allows the position of the seat 1 in the longitudinal direction of the vehicle body to be set in multiple stages. The vehicle interior floor 3 corresponds to the seat mounting surface.

  As shown in FIG. 2, the seat slide device 2 is provided with a pair of elongated rail units 4 and 4 on both sides in the seat width direction (Y-axis direction in FIG. 2). For this reason, the seat 1 is supported on the vehicle interior floor 3 by a pair of rail units 4 and 4 arranged in the seat width direction. In the pair of rail units 4 and 4 in this example, the left side of the paper is 4a and the right side of the paper is 4b. The left rail unit 4a and the right rail unit 4b are symmetrically arranged in the seat width direction.

  As shown in FIG. 3, each rail unit 4a, 4b is provided with a lower rail 5 attached to the interior floor 3 and an upper rail 6 attached to the back surface of the seat 1 so as to be slidable relative to each other. . Since the lower rail 5 serves as a support rail for the upper rail 6, the lower rail 5 is formed longer than the upper rail 6. The lower rail 5 and the upper rail 6 constitute a first rail member and a second rail member.

  As shown in FIGS. 3 to 5, a through-groove 7 is recessed in the upper surface of the lower rail 5 along the longitudinal direction of the lower rail 5 (X-axis direction in FIG. 3). As shown in FIGS. 4 and 5, a space portion 8 communicating with the through groove 7 is provided inside the lower rail 5. A pair of the space portions 8 is formed on both sides in the sheet width direction (the Y-axis direction in FIGS. 4 and 5) with the through groove 7 in the middle. In the space portions 8 and 8 in this example, the outer side in the sheet width direction (left side of the paper surface) is 8a, and the inner side in the sheet width direction (right side of the paper surface) is 8b. The lower rail 5 is formed by bending one steel material (iron plate).

  The upper rail 6 is provided with a hollow main body portion 9 that abuts and supports the seat 1 and an extending portion 10 that is formed in a bifurcated shape downward from the main body portion 9. The extended portion 10 is provided with a base bifurcated portion 11 in which two plates are stacked, and a pair of bent portions 12 and 12 bent upward from the tip of the bifurcated portion 11. . These bent portions 12, 12 have a substantially L-shaped cross section and are arranged symmetrically in the sheet width direction (Y-axis direction in FIGS. 4 and 5). In the pair of bent portions 12 and 12 of this example, the outer side in the sheet width direction (left side of the sheet) is 12a, and the inner side in the sheet width direction (right side of the sheet) is 12b.

  In the upper rail 6, the bifurcated portion 11 is passed through the through groove 7 of the lower rail 5, and the bent portions 12 a and 12 b are accommodated in the space portions 8 a and 8 b of the lower rail 5. The upper rail 6 slides in the vehicle longitudinal direction along the through groove 7 with respect to the lower rail 5. The sliding position of the lower rail 5 and the upper rail 6, that is, the position of the seat 1 in the longitudinal direction of the vehicle body is held by a lock mechanism (not shown) provided between the lower rail 5 and the upper rail 6.

  As shown in FIGS. 2 and 3, between the lower rail 5 and the upper rail 6, rollers 13 that guide the sliding movement of the rails 5 and 6 are attached at a plurality of locations. The rollers 13, 13... Of this example are pivotally supported on the respective side wall surfaces of the outer bent portion 12a and the inner bent portion 12b in the left and right upper rails 6, 6 (only one is shown in FIG. 3).

  The roller 13 of this example has a roller structure in which one upper rail 6 supports the upper rail 6 on the lower rail 5 at three points. The roller structure of this example is a cantilever type having a wheel on only one of the pair of bent portions 12a and 12b at one roller arrangement position, and the longitudinal direction of the upper rail 6 (rail longitudinal direction: One roller 13 is disposed at each of both ends (in the X-axis direction in FIG. 3), and one roller 13 is disposed at the center in the rail longitudinal direction at the inner bent portion 12b to form a three-point support structure.

  For this reason, the roller structure of this example has a structure in which the upper rail 6 is supported at three points with respect to the lower rail 5 by the rollers 13 a and 13 b at each end of the rail unit 4 and the roller 13 c in the middle. Moreover, as for the roller 13 of this example, the cantilever type wheel is arrange | positioned alternately along the rail longitudinal direction. The roller 13 of this example has three wheels when viewed with the rail unit 4 on one side, and has a total of six wheels when viewed with the entire seat 1.

  As shown in FIG. 4, the roller 13 is disposed on the upper surface of the roller rolling wall 5 b that is one step higher than the bottom wall 5 a of the lower rail 5 in the space 8 of the lower rail 5. When the upper rail 6 slides relative to the lower rail 5, the roller 13 rolls on the upper surface of the roller rolling wall 5b, so that the upper rail 6 moves smoothly, that is, the seat 1 is moved with a light force. Position adjustment is secured.

  As shown in FIGS. 2 and 3, shoes 14 that suppress rattling between the rails 5 and 6 are attached at a plurality of locations between the lower rail 5 and the upper rail 6. The shoe 14 is a resin piece for suppressing looseness. In this example, a total of four shoes 14, 14... Are arranged at each end of the outer bent portion 12a and the inner bent portion 12b in the rail longitudinal direction in one rail unit 4. Therefore, four shoes 14 in this example are arranged on each of the left and right, a total of eight when viewed in the entire seat 1. The shoe 14 corresponds to a rattling suppressing member.

  As shown in FIGS. 5 and 6, the shoe 14 includes an outer sliding contact piece 15 that absorbs rattling in the seat width direction (Y-axis direction in FIG. 5), and a rail vertical direction (Z-axis direction in FIG. 5). ) And an upper sliding contact piece 16 that absorbs rattling. The outer slidable contact piece 15 is formed by hollowing a side of the shoe 14 and is in slidable contact with the inner surface of the outer wall 5 c of the lower rail 5. Further, the upper slidable contact piece 16 is formed by hollowing in the upper part of the shoe 14 and can be slidably contacted with the inner surface of the upper wall 5 d of the lower rail 5. Both the upper slidable contact piece 16 and the outer slidable contact piece 15 are formed in a substantially arc shape (arch shape).

  As shown in FIG. 3, the outer slidable contact piece 15 and the upper slidable contact piece 16 are attached to a stepped portion 17 that is recessed at a position one step lower than the tip surfaces of the bent portions 12a and 12b. The outer slidable contact piece 15 and the upper slidable contact piece 16 are positioned on the upper rail 6 by engaging a mounting groove 18 formed therein with the stepped portion 17. The space 8 is formed by a region surrounded by the bottom wall 5a, the roller rolling wall 5b, the outer wall 5c, the upper wall 5d, and the inner wall 5e. The through groove 7 is a region surrounded by the left and right inner walls 5e, 5e.

Next, the operation of the seat slide device 2 of this example will be described with reference to FIGS.
As shown in FIG. 2, when the position of the seat 1 is adjusted in the longitudinal direction of the vehicle body (X-axis direction in FIG. 2), the upper rail 6 slides relative to the lower rail 5, thereby aligning the seat 1. Is called. At this time, when the roller 13 between the lower rail 5 and the upper rail 6 rolls, the sliding force between the rails 5 and 6 is reduced, and the seat 1 can be moved with a light force.

  By the way, as shown in FIG. 4, depending on the case, it is assumed that a deviation is added to the mounting height of one of the rollers 13, and the upper rail 6 is inclined with respect to the lower rail 5 in the direction of arrow A <b> 1 in FIG. The In this case, an excessive load is applied to one specific wheel, and the lower rail 5 and the shoe 14 are in a strong interference state, which may increase the sliding force when the seat 1 is moved. That is, when the position of the sheet 1 is adjusted, the sheet 1 feels heavy, and it is difficult to align the position.

  In some cases, the upper rail 6 may be inclined with respect to the lower rail 5 in the direction of the arrow A2 due to a deviation in the mounting height of the roller 13. If this happens, there is a possibility that one specific wheel in the roller 13 floats from the rail surface and slips. Therefore, although the sliding force at the time of moving the sheet 1 is low, the roller 13 is in a floating state. Therefore, the gap formed at this time becomes a factor of the shakiness of the sheet 1.

  Therefore, in the seat slide device 2 of the present example, the wheels 13 of the rollers 13 arranged in the rail units 4a and 4b are set to three (13a, 13b, and 13c), and the upper rail 6 is changed to the lower rail 5 by these three wheels. Three points were supported. Therefore, if the three-point support structure of this example is adopted, the upper rail 6 can be surface-supported with respect to the lower rail 5.

  Therefore, even if the upper rail 6 may deviate in the direction of the arrow A1 in FIG. 4 with respect to the lower rail 5, the load at this time can be distributed and received by all the rollers 13; One of the rollers 13 does not need to be overloaded. Therefore, even if a height deviation occurs in the direction of the arrow A1 in FIG. 4, the sliding force between the lower rail 5 and the upper rail 6 can be kept low.

  Even if there is a possibility that the upper rail 6 deviates in the A2 direction of FIG. 4 with respect to the lower rail 5, all the rollers 13 maintain a grounded state because the rollers 13 have a three-point support structure. . For this reason, even if a height deviation occurs in the direction of the arrow A2 in FIG. 4, it is not necessary for the roller 13 to be in a floating state. .

  Further, in the seat slide device 2 of this example, it is only necessary to provide three rollers 13 for each rail unit 4a, 4b. That is, when viewed from the entire sheet 1, only six rollers 13 need be provided. Therefore, it is possible to suppress the rattling of the seat 1 while suppressing the number of wheels mounted on the seat slide device 2.

  In the case of this example, each of the rail units 4a and 4b is supported at three points by the three rollers 13, so that each rail unit 4a and 4b is provided between the lower rail 5 and the upper rail 6. Shaking is suppressed. For this reason, the effect becomes high in ensuring the stable slide movement of the seat 1. Note that rattling between the left and right rail units 4 a and 4 b is absorbed by the frame of the seat 1.

According to the configuration of the present embodiment, the following effects can be obtained.
(1) Since the lower rail 5 and the upper rail 6 are supported at three points by the three cantilever rollers 13a, 13b, and 13c, a deviation occurs between the rails 5 and 6 in the rail height direction. Even so, this can be absorbed by the three-point support of the roller 13. Therefore, the number of wheels of the roller 13 can be suppressed to a low level, and rattling of the sheet 1 can be suppressed to a low level.

  (2) A shoe 14 is provided between the lower rail 5 and the upper rail 6 to absorb rattling between the rails 5 and 6. Therefore, not only the three-point support structure of the roller 13 but also the shoe 14 can absorb the rattling between the rails 5 and 6, so that the effect of suppressing the rattling of the sheet 1 is enhanced.

  (3) By the way, since a person sits on the seat 1, there is a possibility that the lower rail 5 is warped and deformed due to the load. The warping deformation referred to here is a deformation in which the center of the lower rail 5 is lowered downward and both ends are lifted upward. However, if the shoe 14 is disposed between the two rollers 13 as in the present example, the shoe 14 works to fill a gap caused by rail deformation, which is effective in suppressing rattling of the sheet 1. Get higher.

  (4) By providing three rollers 13, rattling between each roller 13 and the lower rail 5 is suppressed. For this reason, the deviation in the rail height direction between the lower rail 5 and the upper rail 6 due to such backlash is reduced, and the dimensional variation of the mountable shoe 14 is also reduced. Therefore, it is possible to eliminate the need to set the size of the shoe 14 in accordance with the play between the roller 13 and the lower rail 5, and it is possible to stabilize the slide load of the rail.

Note that the embodiment is not limited to the configuration described so far, and may be modified as follows.
As shown in FIG. 7 (a), the rail-end rollers 13a and 13 may be disposed in the inner bent portion 12b, and the middle roller 13c may be disposed in the outer bent portion 12a.

-As shown in Drawing 7 (b), roller 13 may take the same arrangement direction in right and left rail units 4a and 4b.
The shoe 14 is not limited to be disposed between the rail end roller 13a (13b) and the middle roller 13c. As shown in FIG. 8, the shoe 14 may be disposed outside the rollers 13a and 13b at the rail ends.

The lower rail 5 may be attached to the seat 1 and the upper rail 6 may be attached to the interior floor 3.
The number of rail units 4 is not limited to two, and may be three or more, for example.

The seat mounting surface is not limited to the vehicle interior floor 3 and may be changed to another location.
-The number of attached shoes 14 is not limited to eight in total, and can be changed as appropriate. Moreover, you may change suitably the attachment position of the shoe 14 according to a use condition.

-A rattling suppression member is not limited to the shoe 14, You may use another component.
The arrangement position of the roller 13 is not limited to the example described in the embodiment and other examples, and can be changed to another arrangement place as long as three-point support (surface support) is taken.

The seat slide device 2 is not limited to being applied to a vehicle, and can be applied to other devices and apparatuses.
Next, technical ideas that can be grasped from the above-described embodiment and other examples will be described below together with their effects.

  (A) In any one of claims 1 to 3, the roller is a cantilever type having a wheel only on one side in the sheet width direction, and the wheels are alternately arranged along the rail longitudinal direction. Thus, the roller is supported at three points. According to this configuration, it is not necessary to make a significant design change from the conventional seat slide device.

  (B) In any one of claims 1 to 3 and the technical idea (A), the rattling suppressing member is disposed on both sides in the sheet width direction. According to this configuration, it becomes possible to absorb rattling more effectively.

  DESCRIPTION OF SYMBOLS 1 ... Seat, 2 ... Seat slide apparatus, 3 ... Car interior floor as seat attachment surface, 4 (4a, 4b) ... Rail unit, 5 ... Lower rail which comprises one of 1st rail member and 2nd rail member, 6 ... The upper rail, 13 (13a-13c) ... roller, 14 ... shoe as a rattling suppressing member, the other of the first rail member and the second rail member.

Claims (3)

The first rail member formed on one of the seat and the seat mounting surface is provided with a plurality of rail units that slide relative to the second rail member formed on the other, and the position of the seat can be adjusted by the rail unit. In the seat slide device,
Three rollers are provided for each rail unit between the first rail member and the second rail member, and the first rail member and the second rail member are provided by the three rollers. Is supported at three points. The seat slide according to claim 1, wherein a rattling suppressing member is provided between the first rail member and the second rail member to suppress rattling between the rail members. apparatus. 3. The seat slide device according to claim 2, wherein the rattling suppressing member is disposed between the rollers adjacent to each other in the rail longitudinal direction in one rail unit. 4.

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